Bibcode
Creevey, Orlagh L.
Referencia bibliográfica
Journal of Physics: Conference Series, Volume 118, Issue 1, pp. 012050 (2008).
Fecha de publicación:
10
2008
Número de citas
2
Número de citas referidas
0
Descripción
Seismology of single δ Scuti stars has mainly been inhibited by
failing to detect many of the theoretically predicted pulsation modes,
resulting in difficulties with mode identification. Theoretical and
observational advances have, however, helped to overcome this problem,
but the following questions then remain: do we know enough about the
star to either use the (few) identified mode(s) to probe the structure
of the star? or improve the determination of the stellar parameters? It
is now generally accepted that for the observed frequencies to be used
successfully as seismic probes for these objects, we need to concentrate
on stars where we can constrain the number of free parameters in the
problem, such as in binary systems or open clusters. The work presented
here, investigates how much is gained in our understanding of the star,
by comparing the information we obtain from a single star with that of
an eclipsing binary system. Singular Value Decomposition is the
technique used to explore the precision we expect in terms of stellar
parameters (such as mass, age and chemical composition) as well as how
these parameter uncertainties propagate to the Luminosity-Temperature
(L-T) diagram. This work shows that the information content of the
binary system provides sufficient constraints on the models so that the
mode can be used to probe the star's structure.